828271649 has 2 divisors, whose sum is σ = 828271650. Its totient is φ = 828271648.

The previous prime is 828271601. The next prime is 828271669. The reversal of 828271649 is 946172828.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465178624 + 363093025 = 21568^2 + 19055^2 .

It is a cyclic number.

It is not a de Polignac number, because 828271649 - 2²⁰ = 827223073 is a prime.

It is not a weakly prime, because it can be changed into another prime (828271669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414135824 + 414135825.

It is an arithmetic number, because the mean of its divisors is an integer number (414135825).

Almost surely, 2^828271649 is an apocalyptic number.

It is an amenable number.

828271649 is a deficient number, since it is larger than the sum of its proper divisors (1).

828271649 is an equidigital number, since it uses as much as digits as its factorization.

828271649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 828271649 is about 28779.7089804605. The cubic root of 828271649 is about 939.1268672885.

The spelling of 828271649 in words is "eight hundred twenty-eight million, two hundred seventy-one thousand, six hundred forty-nine".